Related Resources:

Summary

An issue in the tNetTaskLimit process of the Cisco ONS 15454 Transport Node Controller (TNC) could allow an unauthenticated, remote attacker to cause the TNC to reload due to a watchdog timeout.

The issue is due to a packet processing services process missing health pings due to excessive traffic sent to the TNC during stability security testing and the TNC reset due to a watchdog timeout. An attacker could exploit this issue by sending high rates of data traffic to the TNC. An exploit could allow the attacker to trigger a reload of the TNC.

What Is a Cisco Security Notice?

Customers who wish to upgrade to a software version that includes fixes for these issues should contact their normal support channels. Free software updates will not be provided for issues that are disclosed through a Cisco Security Notice.

Customers Using Third-Party Support Organizations

Customers may have Cisco products that are provided or maintained through prior or existing agreements with third-party support organizations, such as Cisco Partners, authorized resellers, or service providers. For these products, customers should consult their service providers or support organizations to ensure that any applied workaround or fix is the most appropriate in the intended network before it is deployed.

Disclaimer

THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.

A stand-alone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy, and may lack important information or contain factual errors.